Spinning, doubling, and twisting machinery



March 31, 1936. s. 2. DE FERRANTI v$035,690

SPINNING, DOUBLING, AND TWISTING MACHINERY Original Filed Feb. 8, 1934 5 sheets-Sheet l.

March 1936- s. 2. DE FERRANTI 5,690 SPINNING, DOUBLING, AND TWISTING MACHINERY Original Filed Feb. 8, 1 5 Sheets-Sheet March 31, 1936. 1D; E RANT 2,035,690

SPINNING, DOUBLING, AND-TWISTING MACHINERY Original Filed Feb. -8, 1954 5 Shets-Sheet s 7 A I 4 74x525;

Patented Mar. 31, 1936 F l C E SPINNING, DOUBLING, AND TWISTING MACHINERY Sebastian Ziani de Ferranti, deceased, late of Hollinwood, England,

by Gertrude Ruth Ziani de Ferranti, executrix, Upper Basildon, Pangbourne, England, assignor to Ferranti Inc., New

York, N. Y.

3 Claims.

This invention relates to thread severing devices for spinning, doubling and twisting ma.- chinery, especially to machines of the high speed flyer type and to thread severing devices which become operative to prevent the passage from the cop to the spinning device of snarls, knots or enlargements of the thread.

In such machines it is very desirable that irregularities in the thread should not be allowed to reach the spinning devices as serious effects on the machine or product might ensue.

The present invention is concerned with a device which is interposed between the feeding cop and the feed rolls of the spinning device which will automatically sever the thread soon after the passage of the irregularity from the cop.

The object of the invention is to provide a device of this character which is cheap and simple and practically infallible.

A further object consists in providing improvements in construction and arrangement of the several parts of such devices.

The invention consists in a device of the character above indicated in which the passage of an irregularity is hindered by an adjustable arresting device which in its turn operates a scissors device through which the thread normally passes on its way to the feed rolls of the spinning device.

The invention also consists in the features of construction and operation of the several parts of the device which is hereinafter fully described with reference to the accompanying drawings.

Referring to the accompanying drawings,

Figure l is a diagrammatic elevation of a spinning machine embodying the device according to the invention.

Figure 2 is a part sectional elevation of the yarn delivering and tensioning part of Figure 1.

Figure 3 is a side elevation of a balance lever in running position.

Figure 4 is a plan view of Figure 3.

Figure 5 is a reversed side elevation of balance lever in position caused by an obstruction in the yarn and showing cutter operating mechanism in dotted lines.

Figure 6 is a section on the line 6-6 of Figure 3.

Figure 7 is a section on the line 1-1 of Figure 5 to a larger scale.

Figure 8 is a side elevation of a balance lever in position taken up when yarn breaks.

Figure 9 is an underside view of the cutters shown to a larger scale than in Figure 5.

Referring to Figures 1 and 2, the feed of yarn takes place from the cops IOI, through the tensioning device I03, over the pulley H3 at the end of the balanced arm I02, thence over the pulleys ItI and I52, through an eye I9, under a lower roll 30, between the lower and an upper roll 8i, over the upper roll and down through the top of the flyer I. The balance arm I02 is raised to such a height above the feed rolls 80, 8| or the length of thread between the ,severing device of the balance arm I02 and the feed rolls is made so great that should a thread be severed a single length will not fall from the top into the rotating parts, and so cause an entanglement before the iiyer has been brought to rest.

For doubling, the cops are arranged in pairs, doubling being effected from the cops directly. The thread from each cop is passed as before mentioned through a tension device I03.

From this tensioning device the yarn passes to the balance arm I02 referred to above. This balance arm consists of an aluminium or like framework III), having two points of suspension HI and H2. It is provided at one end with a pivoted roll H3 fitted with the clearer assembly H4 described below, and a counterbalance I I5 at the other, so that of itself it normally tends to sit with the roll I I3 elevated. When the frame is running the balance arm rests on both pivots, being kept in this position owing to the friction on the yarn introduced by the tensioning device. This friction is insufiicient to cause the balance arm to pivot only on the pivot III nearer the roll should the pull on the yarn become too great, owing to some defect in the yarn on the clearer, on the roll, referred to below, or owing to a hold-up on the cop, the balance arm pivots on the forward pivot only.

The clearer assembly II4 consists of a grooved pulley H5 having a U shaped groove H6 with which a pin II I co-operates. The pin is made of such a size, and the grooves of such a depth, that it will not pass faulty yarn, which latter would become impaled on the spike and cause the lever IIO to tip on to the forward pivot III.

The pin referred to above is mounted in a spring controlled frame H8. The balance arm is provided with a thread severing device II9 disposed in the vicinity of the grooved pulley and consisting of a scissors device, the movable part I20 of which is operated by a wire I2 Ia connected with a light pivoted frame I22, one end of which projects through a slot I2I in the framework H0, in the vicinity of the forward pivot III. The shape of this slot and the position of the projecting part is such that when the arm III] pivots about the rear pivot II2, the projection from the scissors operating frame I22 is quite clear of the side of the slot I2I in which the scissors projection rides, but when the arm H is caused to pivot about the forward pivot II I, the side of the slot l2l catches the projection, causing it to ride backwards in its own slot I21 and sever the yarn.

On the yarn being severed, the arm H0 becomes free, and assumes the position correspond-- ing to position of equilibrium, which may be vertical or substantially so as controlled by the general framework of the machine.

This application is a division of my application No. 710,366, filed February 8, 1934, now Patent No. 2,010,179 dated August 6, 1935.

Having now described the invention, what is claimed as new and desired to secure by Letters Patent is:

1. An automatic device for severing an individual yarn in a high speed spinning machine which includes means responsive to the passage of an irregularity in the yarn into the said automatic device and means operated by the said responsive means to sever the thread, characterized in that the said responsive means include a rockable arm having two parallel lateral pivoting axes, a fixed abutment for coacting with said axes, a grooved yarn guiding pulley, a clearer device and a scissors device so arranged on one end of said arm that the yarn passes normally through the clearer device, over the grooved pulley and through the open scissors device, the other end of said arm carrying a counter weight suflicient to cause the arm to rest on both pivots simultaneously during normal operation, and means operated by the downward displacement of the pulley end of said arm consequent upon the passage of an irregularity into the clearer device to close the scissors device and thus sever the thread.

2. An automatic device for severing yarn as claimed in claim 1, the said latter means comprising a lever projecting from the side of said rockable arm and adapted to coact with the said fixed abutment, a movable blade of said scissors device and a link connecting said movable blade with said lever.

3. An automatic device for severing yarn as claimed in claim 1 the said clearer device comprising a pointed member fixed to the same end of the rockable arm as the guide pulley and arranged to point in the opposite direction to the normal run of the yarn to form with the groove in the said grooved pulley an aperture through which normal yarn may pass without hindrance a scissors device arranged on the run of the yarn.

GERTRUDE RUTH ZIANI DE FERRANTI, Executria: of the Estate 0 Sebastian Zz'anz' de Few-anti, Deceased. 

